Explain the following statement.
The first ionisation energy of potassium is smaller than the first ionisation energy of calcium.
Explain the following statement.
The first ionisation energy of potassium is larger in value than rubidium
An element has the following electron configuration.
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4
The periodic table can be divided into blocks.
State why are silicon, carbon, oxygen and chlorine all classified as p-block elements.
State the general trend in first ionisation energies across period 3.
Antimony, Sb, has atomic number 51.
Using section 6 of the data booklet, complete the table to show where antimony is found in the periodic table.
Period |
Block |
Identify the element that is in the d-block of the periodic table which forms a 3+ ion with the following electron configuration.
[Ar] 3d3
Ionisation energies can provide evidence for electron structure.
Write an equation, including state symbols, for the first ionisation energy of chlorine.
An element Y has the following six first ionisation energies in kJ mol-1. These are shown in the table below.
1st |
2nd |
3rd |
4th |
5th |
6th |
|
Ionisation energy (kJ mol-1) |
577 |
1820 |
2740 |
11 600 |
14 800 |
18 400 |